Collins Chinese Dictionary Plus (3rd edition), 2011:
grandchild [ˈgræntʃaɪld]
(pl grandchildren)
n [c] (male on father's side) 孙(孫)子 sūnzi [个 gè]
(female on father's side) 孙(孫)女 sūnnǚ [个 gè]
(male on mother's side) 外孙(孫) wàisūn [个 gè]
(female on mother's side) 外孙(孫)女 wàisūnnǚ [个 gè]
(pl grandchildren)
n [c] (male on father's side) 孙(孫)子 sūnzi [个 gè]
(female on father's side) 孙(孫)女 sūnnǚ [个 gè]
(male on mother's side) 外孙(孫) wàisūn [个 gè]
(female on mother's side) 外孙(孫)女 wàisūnnǚ [个 gè]
在这些条目还发现'grandchild':
在英文解释里: